Oscillating engine



H. WIGHTMAN AND W. WARDEN, OF ALLEGHENY, PENNSYLVANIA.

OSCILLATING ENG-INE.

Specification of Letters Patent No.

To all whom t may concern:

Be it known that we, HUGH VIci-ITMAN and VILLIAM WARDEN, of the city and county of Allegheny, in the State of Pennsylvania, have invented certain new and useful Improvements in Oscillating Engines; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

To enable others skilled in the art to make and use our invention we will proceed to describe its construction and operatio-n.

In constructing our engine we use the cylinder piston, crank, fly-wheel, and the other appendages necessary to the construction of an oscillating engine, but in order to economize in constructing and to save steam and prevent the leakage of steam, and also to avoid friction we cast the stand, heater, plumber-block, steam chamber (or chest) and the seat for the conical throttle valve in one piece. IVe also make two openings on the under surface of one or both of the trunnions, three openings in one or both of the plumber-blocks. Ve also make a conical throttle valve with two supply and three exhaust openings in it. The openings in the plumber-block, trunnion, and conical valve are adapted the one to the other in size, form and the distance apart. The openings in the plumber-block form a connection between the openings in the trunnion of the cylinder and the steam chamber or chest by means of the two supply openings in the throttle valve, and the Supply and exhaust of the cylinder is regulated by the movement of and the openings in the conical throttle valve. The steam chamber or chest is placed in front of the valve seat so that the pressure of the steam can act on the largest end of the conical valve. By this arrangement the throttle valve is always kept perfectly steam tight, but, in order to prevent the valve becoming wedged into or working too hard in its seat, we place a metallic ring at the small end of the valve, and by the aid of set screws and the metallic ring we can regulate the pressure of the valve in its seat.

W'e get the desired motion of the engine by changing the position of the throttle valve. This is done by altering the position of the levers. Thus if the engine has a for- 14,124, dated January 15, 1856.

ward motion and is supplied through the side openings and exhausts at the center openings of the plumber block, as seen in Figure 3 of the accompanying drawings, we get the reverse motion by changing the position of the throttle valve so as to supply the cylinder through the center opening and exhaust at the side openings of the plumber-block, as seen in Fig. 2, we work the cut-oi1 by attaching the lever B to the wrist E on the cylinder as seen in Fig. l.

In the accompanying drawings Fig. 1, is a side view of the cylinder levers and a cut view of the stand, heater, throttle valve, trunnion, plumber block and cap, and exhibits the openings in the trunnion plumberblock and throttle valve closed, or in the language of engineers is a representation of the engine on the dead center. Fig. 2, is a cut view of the stand, heater, throttle valve, trunnion plumber-block and cap, and is a representation of the engine taking steam at the center opening and exhausting at t-he side openings of the plumber-block- Fig. 3, is a cut view of the stand, heater, throttle valve, trunnion, plumber block and cap, and is a representation of t-he engine taking steam at the side openings and eX- hausting at the center opening of the plumber-block. Fig. t is a cut view or central section lengthwise the trunnion and across the cylinder, and represents the stands, plumber blocks and cap, trunnions and cylinder, throttle valve, metallic ring, set screws, steam chamber or chest, and supp-ly pipe.

In t-he accompanying drawings, A, is the cylinder.

B and C are the lever.

D is a bolt which connects the levers, B and C, together.

E is the wrist for attaching the levers to the cylinder.

F is a broken section of a piston.

I-I is t-he trunnion.

I is the stand which forms the heater T, and the plumber-block, and the seat for the conical throttle valve J.

L is the openings in the plumber-block.

M is the openings in the trunnion.

N is the exhaust and O the supply openings in the conical throttle valve.

P is the caps for the plumber block. K is the exhaust pipe on the heater. R is the supply pipe.

Cil

sented our invention what we Claim as new and desire to secure by Letters Patent of the United States, is-

. The arrangement of the plumber block (I) with its steam openings (L L L) in oorrespondence with the steam-openings of the hollow trunnion of an oscillating steam engine and the stezun openings of a suitablel Valve, so that the plumber-block lies Contiguously between the trunnion and the Valve and furnishes more or less a seat respectively for the trunnon and the Valve substantially as described and for the purposes represented.

H. VVIGHTMAN. VM. WARDEN. Witnesses ALEX HAYs,

S. B. W. GILL. 

